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Una serie de accidentes inexplicables ocurren a las personas y empresas responsables del desarrollo del SST1. Hugh Drummond es enviado a investigar y, con la ayuda de otro agente, descubre un complot planeado por Carl Petersen, quien va a ganar ocho millones libras si el avión no está listo en una fecha determinada. El malvado Petersen ha desarrollado una serie de androides (hermosas chicas con "cerebros electrónicos") para ayudarle a sabotear el proyecto SST1, por medio de "infrasonido" (extrema frecuencia de las ondas de sonido de baja) que se pueden dirigir a las personas u objetos con resultados devastadores.

Reparto principal

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Richard Johnson

Hugh Drummond

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Daliah Lavi

Helga

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Beba Lončar

Pandora

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James Villiers

Carl Petersen

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Vanessa Howard

Robot No. 7

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Maurice Denham

Mr. Mortimer

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Robert Morley

Miss Mary

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Sydne Rome

Flicky

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Adrienne Posta

Drummond's Daily

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Florence Desmond

Lady Manderley

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Ronnie Stevens

Peregrine Carruthers

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Virginia North

Robot No. 9

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Nicholas Phipps

Lord Dunnberry

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Yutte Stensgaard

Robot No. 1

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George Belbin

Maj. Newman

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Richard Hurndall

President of Aircraft Company

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Marga Roche

Birgit

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Douglas Sheldon

Kruger

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Maria Aitken

Robot Flight Attendant (uncredited)

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Bob Anderson

Senior Aerodynamics Engineer (uncredited)

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Peter Brace

Petersen Bodyguard (uncredited)

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Johnny Briggs

Air Traffic Controller (uncredited)

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Shakira Caine

Robot Observer (uncredited)

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Carmen Dene

Party Girl in Green Dress (uncredited)

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Frank Gatliff

Man Sitting Behind Pilot

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Philip Gilbert

Test Co-Pilot (uncredited)

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Dora Graham

Robot Twin (uncredited)

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Doris Graham

Robot Twin (uncredited)

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Aidan Harrington

Test Navigator (uncredited)

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William Kendall

Wing Commander Aston (uncredited)

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Juba Kennerley

Test Area Official with Bow Tie (uncredited)

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Olga Linden

Blond Robot in Green Jumpsuit (uncredited)

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Joanna Lumley

Robot Saboteur (uncredited)

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John Paul

Test Pilot (uncredited)

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Patsy Snell

Brunette Robot with Bangs (uncredited)

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Guy Standeven

Flight Test Observer (uncredited)

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Totti Truman Taylor

Cookery Student Wearing Hat (uncredited)

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Jim Tyson

Hefty Cookery Student (uncredited)

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Les White

Petersen Bodyguard (uncredited)

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